XML 59 R49.htm IDEA: XBRL DOCUMENT v3.22.2.2
Common Stock Warrants - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Mar. 23, 2021
Nov. 29, 2019
Nov. 26, 2019
Jun. 30, 2022
Sep. 30, 2022
Sep. 01, 2022
Jul. 06, 2022
Mar. 03, 2022
Dec. 31, 2021
Nov. 02, 2020
Apr. 16, 2019
Class of Stock [Line Items]                      
Common stock, shares authorized         500,000,000 500,000,000     125,000,000    
Common stock, par value (in usd per share)         $ 0.001       $ 0.001    
Dividends on common stock declared or paid         $ 0            
Warrant exercise price (usd per share)             $ 1.095        
Class of Warrant or Right, Additional Exercise Price of Warrants or Rights   $ 0.001         $ 0.001 $ 0.01   $ 0.01  
Warrants and rights outstanding, term         60 months   5 years        
Issued         64,968,310            
Class of warrants or rights expiration period (in years)     30 days                
Class Of Warrant Or Right Issued, Weighted Average Exercise Price         $ 1.10            
Warrants and Rights Outstanding, Transaction Fees       $ 2,900,000              
Fair value of warrant liability         $ 310,000       $ 821,000    
Change in fair value         (3,006,000)            
Warrant Liability                      
Class of Stock [Line Items]                      
Fair value of warrant liability         0       $ 0    
Change in fair value         $ (2,495,000)            
Pre Funded Warrant                      
Class of Stock [Line Items]                      
Fair value of warrant liability             $ 13,500,000        
Warrant Liability                      
Class of Stock [Line Items]                      
Fair value of warrant liability           $ 38,754,000 $ 41,249,000        
Issuance on March 3 2022                      
Class of Stock [Line Items]                      
Warrant exercise price (usd per share)         $ 1.80            
Issuance on July 6 2022                      
Class of Stock [Line Items]                      
Warrant exercise price (usd per share)         $ 1.50            
Q2 2022 Private Placement                      
Class of Stock [Line Items]                      
Stock Issued During Period, Shares, New Issues         37,649,086            
Class of warrant or right, warrants to purchase of common stock (in shares)         50,925,365            
Sale of stock, price per share (in usd per share) $ 1.095                    
Warrant exercise price (usd per share)   1.095                  
Class of Warrant or Right, Additional Exercise Price of Warrants or Rights $ 0.001                    
Proceeds from issuance of common stock before underwriting discounts commissions and other expenses $ 55,700,000                    
Q2 2022 Private Placement | Pre Funded Warrant                      
Class of Stock [Line Items]                      
Class of warrant or right, warrants to purchase of common stock (in shares)         13,276,279            
Warrant exercise price (usd per share)     $ 1.094                
Q1 2022 Private Placement                      
Class of Stock [Line Items]                      
Stock Issued During Period, Shares, New Issues         900,000            
Sale of stock, price per share (in usd per share) $ 1.80                    
Class of Warrant or Right, Additional Exercise Price of Warrants or Rights $ 0.01                    
Proceeds from issuance of common stock before underwriting discounts commissions and other expenses $ 3,000,000                    
Q1 2022 Private Placement | Pre Funded Warrant                      
Class of Stock [Line Items]                      
Class of warrant or right, warrants to purchase of common stock (in shares)         766,666            
Warrant exercise price (usd per share)         $ 1.79            
Class B Warrants                      
Class of Stock [Line Items]                      
Warrant exercise price (usd per share)   $ 15.00                  
Issued   5,416,667                  
Pre Funded Warrant                      
Class of Stock [Line Items]                      
Number of warrants for purchase of convertible preferred shares (in shares)                     1